Allow the prompt request to specify the prompt ID.

[FeepingCreature]

This makes it easier to write asynchronous clients that submit requests, because they can store the task by id immediately rather than waiting for the prompt api to return.

Specifically I want it so that Krita AI Diffusion can stop fetching the prompt id async, because I suspect it's causing a timing issue.

[FeepingCreature]

Should I change the API demo to generate a uuid on the client side?

[christian-byrne]

Good change. Maybe there can be an example/comment/line added here https://github.com/comfyanonymous/ComfyUI/blob/master/script_examples/basic_api_example.py since there is no api spec for the webserver yet.

[FeepingCreature]

Added an example to the websocket api test, because the simple api test doesn't do anything with the response.

[comfyanonymous]

This is fine but you need to add a check to see if the prompt id is already used if it is specified and return an appropriate error.

[FeepingCreature]

Okay so I can do that but it's gonna be ugly. Because of the PromptQueue mutex, the only place to check that is in PromptQueue.put, otherwise there's always a chance of timing errors. But right now put doesn't even know what a prompt_id is. If there's a trivial way to do it I don't see it. I'd just trust the client to rng correctly.